'use client';

interface ApiOptions { method?: string; headers?: Record<string,string>; body?: unknown }

export async function apiRequest<T = unknown>(path: string, options: ApiOptions = {}): Promise<T> {
  const token = typeof window === 'undefined' ? null : localStorage.getItem('pk_token');
  const headers: Record<string,string> = { Accept: 'application/json', ...(options.headers || {}) };
  if (options.body !== undefined) headers['Content-Type'] = 'application/json';
  if (token) headers.Authorization = `Bearer ${token}`;
  const response = await fetch(path, {
    method: options.method || 'GET',
    headers,
    body: options.body === undefined ? undefined : JSON.stringify(options.body),
    cache: 'no-store'
  });
  const data = await response.json().catch(() => ({}));
  if (!response.ok) {
    const detail = typeof data.detail === 'string' ? data.detail : '请求失败';
    throw new Error(detail);
  }
  return data as T;
}

export async function ensureLogin(): Promise<void> {
  if (localStorage.getItem('pk_token')) return;
  let previewId = localStorage.getItem('pk_preview_id');
  if (!previewId) {
    previewId = `${Date.now().toString(36)}${Math.random().toString(36).slice(2)}`;
    localStorage.setItem('pk_preview_id', previewId);
  }
  const session = await apiRequest<{ token: string }>('/api/v1/auth/xhs', {
    method: 'POST',
    body: { app_key: 'hub', code: `dev:web-${previewId}` }
  });
  localStorage.setItem('pk_token', session.token);
}